Zardari also urged the United States to provide more financial help to curb the terror menace originating from its soil.

Pakistan Ambassador to the United States, Hussain Haqqani also ruled out any possibility of Pakistan's nuclear assets falling into the hands of the extremists.

"We have very good safety precautions and arrangements. And the American government knows that there is no threat of Pakistan's nuclear weapons falling into anybody's hands. The safety arrangements that are in place are known to both countries," Haqqani claimed.

Haqqani said Pakistan only acquired nuclear capability after it was achieved by India.

"We did not acquire the nuclear weapons to threaten the world. We acquired them because of the conventional superiority of our neighbour, India, with whom we have had disputes, which we are trying to resolve," he added.